DS1876T+ Maxim Integrated Products, DS1876T+ Datasheet - Page 64

• Manufacturer Part Number: DS1876T+
• Description: IC CTRLR SFP DUAL LDD 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: SFP Laser Controllerr

Specifications of DS1876T+

• Input Type: Logic
• Output Type: Logic
• Interface: I²C
• Current - Supply: 10mA
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SFP Controller with Dual LDD Interface
Table 04h, Register 80h–C7h: MODULATION LUT (MOD)
Table 02h, Register C8h–F7h: EMPTY
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80h–C7h
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
These registers do not exist.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
Digital value for the MOD1 DAC (A2h address) and MOD2 DAC (B2h address) outputs. The MODULATION LUT
is a set of registers assigned to hold the temperature profile for the MOD1 and MOD2 DACs. The temperature
measurement is used to index the LUT (TINDEX, Table 02h, Register 81h) in 2NC increments from -40NC to
+102NC, starting at 80h in Table 04h. Register 80h defines the -40NC to -38NC MOD output, Register 81h defines
-38NC to -36NC MOD output, and so on. Values recalled from this EEPROM memory table are written into the
MOD1 and MOD2 DACs (Table 02h, Registers C8h–C9h, CCh–CDh) locations that hold the values until the next
temperature conversion. The part can be placed into a manual mode (MOD1EN and MOD2EN bits, Table 02h,
Register 80h), where MOD1 and MOD2 DACs are directly controlled for calibration. If the temperature compen-
sation functionality is not required, program the entire Table 04h to the desired modulation setting.
BIT 7
2
7
2
6
00h
N/A
N/A
N/A
None
00h
PW2 or (PW1 and RWTBL46)
PW2 or (PW1 and RWTBL46)
Different A2h and B2h memory locations
Nonvolatile (EE)
2
5
2
4
2
3
Table 04h Register Descriptions
2
2
2
1
BIT 0
2
0